1) ln a class, there are 18 boys who are over 160 cm tall. If these constitute three-fourths of the boys and the total number of boys is two-thirds of the total number students in the class, what is the number of girls in the class? A) 6 B) 12 C) 18 D) 24 Answer: Option BExplanation:let the number of boys be x .Then 3/4x =18 or x =18 x 4/3 = 24 If total number of students is y , then 2/3y = 24 or y = 24 x 3/2 = 36 Number of girls in the class = 36-24 = 12
